html - Change Combo color on focus -

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i want change border color on focus combo box. has class .ui-selectonemenu class , on focus ui-state-focus class gets applied same level. trying write selector .ui-selectonemenu .ui-state-focus , tried .ui-selectonemenu :focus both not working. suggestions. doing primefaces

 .ui-selectonemenu             {                 width:150px;                 padding:5px;             } .ui-selectonemenu:hover, .ui-selectonemenu:focus             {                 background:#ffd800;                 border:px solid #f00;             }

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